Flora of North America species comparison

trigonous, 5–25 cm × 1–1.5 mm, glabrous.

trigonous, 1–35 cm × 0.5–1 mm, glabrous.

flat, 5–20 cm × 1–2 mm.

spikes loosely ovoid, 15–25 mm wide;

rays 1–6, 2–7 cm;

bracts 2–5, 3–20 cm, ascending;

rachilla deciduous, winged.

heads ± digitate, 8–26 mm diam.;

rays 1–6, 0.5–5 cm;

bracts 3–4, ± horizontal, flat, 3–18 cm × 1–2 mm.

5–30, linear, flattened, 6–22 × 1.5–2.2 mm;

floral scales ± deciduous, (4–)8–12, red, reddish purple, or reddish brown, medially green, elliptic, laterally 2–4-ribbed, 2.3–3.1 × 1.2–2 mm, apex acute to obtuse.

6–25, ovoid to linear-lanceoloid, compressed, 4–15 × 1–2 mm;

floral scales 8–28(–40), clear, laterally ribless, ovate, 1.4–1.6 × 0.8 mm, apex awned, awn excurved, 0.3–0.5 mm.

anthers 0.3–0.4 mm;

styles 1 mm;

stigmas 1.3–1.6 mm.

stamens 1–2;

anthers 0.2 mm;

styles 0.5 mm;

stigmas 0.3 mm.

brown to dark purplish brown, broadly ellipsoid, 1–1.3 × 0.6–0.9 mm, surfaces puncticulate.

dark brown to black, sessile, obovoid, 0.6 × 0.4 mm, apex obtuse, apiculate, surfaces minutely punctate.